A battery liquid cooling device and a battery system

Abstract

A battery liquid cooling device is disclosed, which comprises a liquid cooling plate with a medium flow channel inside, the liquid cooling plate is provided with at least one hole channel communicating with the internal medium flow channel, and the liquid cooling plate is provided with a sealing sheet for sealing the port at the port of any one of the holes, and the sealing sheet is provided witha notch which is of an annular structure, and the notch is positioned on the inside of the hole channel and is coaxially arranged with the hole channel. The present invention provides a battery systemcomprising a plurality of batteries and a battery liquid cooling device as described above, wherein liquid cooling plates in the battery liquid cooling device are respectively in contact with each battery. The invention can effectively enhance the reliability of hole channel sealing.

Description

technical field [0001] The invention relates to the technical field of battery manufacturing equipment, in particular to a battery liquid cooling device and a battery system. Background technique [0002] During the use of the battery system, due to defects in the battery manufacturing process, there is a risk of self-discharge or even internal short circuit. When an internal short circuit occurs in the battery, the battery will generate a large amount of heat instantly, and in severe cases, it will catch fire. Since the battery system is composed of multiple batteries connected, when the thermal runaway of a single battery cannot be effectively controlled, it will easily affect other batteries, thereby causing thermal runaway of the entire battery system. Therefore, it is necessary to add a fire extinguishing device. However, the battery system has extremely high requirements on energy density. If the relevant components are added, the weight of the system will inevitably ...

AI Technical Summary

Problems solved by technology

Since the battery system is composed of multiple batteries connected, if the thermal runaway of a single battery cannot be effectively controlled, it will easily spread to other batteries, thereby causing the thermal runaway of the entire battery system, so it is necessary to increase the fire extinguishing device

However, the battery system has extremely high requirements on energy density. If more related components are added, the weight of the system will inevitably increase, which will reduce the energy density of the battery system.

Therefore, Patent No. 201710061580.9 proposes a battery liquid cooling device and battery system. Although the battery liquid cooling device and battery system can achieve the functions of extinguishing fire and ensuring the energy density of the battery system, because the through holes are made of hot-melt materials Sealed, but the wettability of the hot-melt material and the liquid-cooled plate material is insufficient, and the reliability of the seal is insufficient. Therefore, it is easy to accidentally open the through hole, and the processing technology of the hot-melt material is complicated and the cost is high

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